Machine for forming the teeth of saws



F. A. LAMBLEY.

MACHINE FOR FORMING THE TEETH 0F SAWS.

APPLIMTION FILED NOV. 20, 1918.

1,356,073. Patented 0@t.19,1920.

4 SHEETS-SHEET l.

v I l 2 1 6. I a

F. A. LAMBLEY. MACHINE FOR FORMING THE TEETH 0F SAWS.

APPLICATION mm NOV. 20, ms.

Patented Oct. 19, 1920.

4 SHEETS-SHEET 2.

F. A. LAMBLEY.

MACHINE FOR FORMING THE TEETH 0F SAWS.

APPLICATION FILED NOV- 20, 1918.

1,356,073. Patented 0ct.19,1920.

4 SHEETS-SHEET 3.

F. A. LAMBLEY.

MACHINE FOR FORMING,.THE TEETH OF SAWS. APPLICATION FILED NOV. 20 I918.

1,356,073. Patented Oct.19,1920.

4 SHEETSSHEET 4.

Jamal v 9m mwf UNITED STATES PATENT OFFICE.

FELIX ARTHUR LAll/IBLEY, OF NEWARK-UPON-TRENT, ENGLAND, ASSIGNOB TO A.

RANSOME & COMPANY, LIMITED, OF NEWARK-UPON-TBENT, ENGLAND.

MACHINE FOR FORMING THE TEETH OF SAWS.

Specification of Letters Patent.

Patented Oct. 19, 1920.

Application filed November 20. 1918. Serial No. 263.264.

To all whom it may concern:

Be it known that I, FELIX ARTHUR LAMB- LEY, a subject of the King of Great Brit ain, residing at Stanley Works, Newarkupon-Trent, England, have invented a new and useful Improvement in Machines for Forming the Teeth of Saws, of which the following is a specification.

This inventionrelates to improvements in machines for automatically swaging' and side-dressing the teeth of saws, particularly the wide band saws used-for sawing logs, but it is also applicable for making saws of other types.

According to this invention, the teeth are swaged and side-dressed simultaneously and automatically in one machine, and the mech anism is so arranged that the operator has each tooth in sight while the operations are being performed. I

The invention is illustrated by the accompanying drawings, of which Figure 1' is a front view, Fig. 2 a rear View, Fig. 3 a plan with some parts removed, Fig. 4c a left hand end elevation, Fig. 5 a section on the line A--A, Fig. 3, looking from the right, Fig. 6 a part sectional plan, Fig. 7. a right hand end view of the swaging mechanism, Fig. 8 is a view to a larger scale showing the swaging operation, and-Fig. 9 shows part of a saw in various stages of manufacture.

Before passing to the description of the machine Fig. 9 should be examined in order that the operations effected by the machine may be the more readily understood. In these figures, a is part of a band saw with a tooth Z) in the form which the teeth have before they are treated in the machine; an other tooth 0 is shown in the intermediate form after it has been swaged; while a third d has the final form possessed by the teeth as they leave the machine after being both swaged and side-dressed; by the latter operation the cuttingedg'es of each tooth are pressed in toward the plane of the blade and each tooth is given the same width, shape and side clearance.

1 is the frame of the machine; parts 2, 2, of this frame serve asinclined guides on which works a swaging head 23 carrying an adjustable anvil 4 adapted to rest upon the top of a saw tooth 5, while the latter is being swaged by a tool 6.

7 is the main shaftof the machine, fitted with fast and loose pulleys 8- at the back. On the shaft 7 is a pinion 9 meshing with a toothed wheel 10 carrying on its front face a roller 11 which, as the wheel rotates, comes into contact with a surface 12 on an arm 13 fast ona spindle '14 which is journaled in the swaging head 3 and has mounted in it the tool 6. In the operative position of the head 3, which is that shown in Figs. 1, 2, 7 and 8; thistool 6 rests against the following edge'of a saw tooth 5, while the anvil 4. rests on the top of the tooth; the toolis then oscillated about the axis of the spindle 14 and swages the tooth, converting it from theformb to the form 0, (Fig. 9).

When the roller 11 has passed clear of the surface 12 the weight of the arm causes it to return to its normal position. The swagmg head is thus moved out of the path of the teeth so that the saw can be fed through the machine without any fear of the teeth'being damaged by the swaging head as the saw moves. Y

The roller 11 now moves on until it comes against the arm 15 ofa lever-pivoted to the frame. The other arm 16 of this lever carries a roller 17 which is, by the action of the roller 11 on the lever, pressed against the left face of the head 3, which is therefore moved up the guides 2, compressing a spring 18 and removing the anvil 4 and tool 6 from the saw tooth 5. As soon as the roller 11 passes clear of the lever'15, the spring 18, aided by the weight of the head, moves the head down the guides 2 to the operative position, but meanwhile a link 19 connecting the arm 16with an arm 20 on a cross "shaft 21 has rocked this cross shaft'and'also an arm 22 upon it so that a rod 23 pivoted to the top of the arm 22 has fed the saw forward a distance equal to that between two consecutive'teeth, with the result that the anvil and tool come into position above and below a fresh tooth.

In order that the saw may be firmly gripped to the swaginghead while it is being 'swaged, a vise 241- (see Fig; 5) is provided, capable of a transverse movement across guides 240 on'the top of'the swaging head. From this vise depends a bar 25 carrying a roller 26 which ispressed rearward by a cam 27 on the shaft 28 of the wheel 10. This shaft is constantly urged to the rear of the machine by a spring 29 so'that the grip of the vise is due to this spring. Owing to this fact the vise Wlll grip effectively saws of various gages and a saw of which the thickness varies at varying points in its length and moreover will so grip the saw without indenting its surface on either side.

hile the teeth are being side dressed the saw is supported between two blocks, one, 80, of which is fixed, while the other, 31, is carried by blade springs 32, the pressure of which can be adjusted by means of a hand wheel 33 and screw 84.

On the rear of the wheel 10 is a roller 35 adapted to bear against the under side of a weighted lever arm 36 pivoted to the frame at 37 and connected by a link 38 to an arm 39 on a shaft 40 which carries a pair of arms 41 provided with coned rollers 42. On the frame is mounted a bracket 43 carrying a spindle 44. on which is pivoted a block 45 carrying two pins 46 on which are pivoted two dependent bars 47, the lower ends of which carry the side-dressing tools 48, that one of the tools which is nearer the front of the machine having at its rear end a finger 49 (see Fig. 4) adapted to engage behind the saw tooth that is to be dressed. Supported by the bracket is an arm 50 (see Figs. 1 and 6) surrounded by a coiled spring 51 and terminating in a wedge 52 which lies between the two bars 47. As the shaft 40 is rocked the cones 4-2 come into contact with the bars 47 and at first press them to the left about the axis of the spindle 44: until such movement is arrested by the linger 49 coming against a saw tooth 5,.when the con tinued movement of the cones causes the two bars to converge, the tools 48 acting on the tooth and changing its form from 'that of 0 (Fig. 9) to that of (Z. Asthe shaft 40 rocks back to the position shown in Fig. i the spring 51 and wedge 52 cause the bars 47 to return to their inoperative position.

53, 58. are rollers pivoted to the frame 1 and adapted to support the saw in its passage through the machine. I

T he machine is provided with'means for adjusting many of the parts, but as a detailed description of these adjustments is not necessary to an understanding of the invention it is not given.

It will be seen that as the position of the swaging tool and the position of the side dressing tools are independent of the means for feeding the saw through the machine and of one another, or in other words, both the swaging tool and the side dressing tools follow up the particular teeth. upon which they are about to operate, the operations of swaging and side dressingeach tooth take place in the correct positions for each tooth even should the pitch of the teeth vary throughout the length of a saw.

It will also be seen that the operation of swaging the teeth is easily seen by an attendant who can readily adjust the set of the anvil or of the swaging tool should he see that they are not operating properly.

What I claim is 1. In a machine for forming the teeth of saws, the combination of a swaging head, an anvil carried thereby and adapted to rest upon the tops of the teeth, a swaging tool carried by the head, yielding means for moving the swaging head into the operative position whereby the svvaging tool takes up the correct position beneath each tooth in turn, means for moving the swaging head out of the operative position and means for rotating the tool.

2. In a machine for forming the teeth of saws, the combination of means for feeding a saw through the machine, a swaging head. an anvil carried thereby and adapted to rest upon the tops of the teeth, a swaging tool capable of taking up the correct position beneath each toothin turn, means for moving the swaging head so that the anvil and tool disengage the tooth and a spring adapted to return the swaging head into operative po sition. I

3. In a machine for forming the teeth of saws, the combination of a swaging head, an anvil carried thereby and adapted to rest upon the tops of the teeth, a swaging tool capable of taking up the correct position beneath each tooth in turn, means for imparting to the head a reciprocating movement, means for rotating the tool, a vise carried by the head, a spring and means for causing the spring to exert upon the vise pressure for clamping the saw to the head during the swaging of a tooth.

4:. In a machine for forming the teeth of saws, the combination of means for feeding a saw through the machine, guides inclined to the line of travel of the saw, a swaging head, means for imparting to the head a reciprocating movement along the guides. an anvil carried by the head and adapted to rest upon the tops of the teeth, a swaging tool capable of engaging beneath the teeth,

means for rotating the tool,- a vise carried by the head and means for causing the vise to clamp the saw to the head during the swaging of a tooth.

5. In a machine for forming the teeth of saws, the combination of means for feeding a saw through the machine, guides inclined to the line of travel of the saw, a swaging head, means for imparting to the head a reciprocating movement along the guides, an anvil carried by the head and adapted to rest upon the tops of the teeth, a swaging tool capable of engaging beneath the teeth, means for rotating the tool, a vise carried by the head and means for causing the vise to clamp the saw tothe head during the swaging of a tooth. L

6. In a machine for forming the teeth of saws, the combination of means for feeding a saw through the machine, guides inclined to the line of travel of the saw, a si'vaging head, means for imparting to the head a reciprocating movement along the guides, an anvil carried by the head and adapted to rest upon the tops of the teeth, a swaging tool capable of engaging beneath the teeth, means for rotating the tool and means for side dressing the teeth after they have been savaged.

7. In a machine for forming the teeth of saws, the combination of means for feeding a saw through the machine, guides inclined to the line of travel of the saw, a

,swaging head, means for imparting to the head a reciprocating movement along the guides, an anvil carried by the head and adapted to rest upon the tops of the teeth, a swaging tool capable of engaging beneath the teeth, means for rotating the tool, a vise carried by the head, means for causing the vise to clamp the saw to the head during the swaging of a tooth and means for side dressing the teeth after they have been svvaged.

8. In a machine for forming the teeth of saws, the combination of means for feed ing a saw through the machine, guides inclined to the line of travel'of the saw, a swaging head, an anvil carried by the head and adapted to rest upon the tops of the teeth, a swaging tool capable of engaging beneath the teeth, means for rotating the tool, means for moving the head along the guides out of the operative position and a spring adapted to return the head to the operative position.

9. In a machine for forming the teeth or" saws, the combination of means for feeding a saw through the machine, guides inclined to the line of travel of the saw, a swaging head, an anvil carried by the head andadapted to rest upon the tops of the teeth, a swaging tool capable of engaging beneath the teeth, means for rotating the tool, means for moving the head along the guides out of the operative position, a spring adapted to return the head to the operative position, a vise carried by the head and means for causing the vise to clamp the saw to the head during the sivaging'of a tooth.

10. In a machine for forming the teeth of saws, the combination of means for feeding a saw through the machine, guides inclined to the line of travel of the saw, a

swaging head, an anvil carried by the head and adapted to rest upon the tops of the teeth, a swaging tool capable of engaging beneath the teeth, means for rotating the tool, means for moving the head along the guides out of the operative position, a

spring adapted to return the head to the operative position, and means for side dressing the teeth after they have been swaged.

11. In a machine for forming the teeth of saws, the combination of means for feeding a saw through the machine, guides inclined to the line of travel of the saw, a swaging head, an anvil carried by the head and adapted to rest upon the tops of the teeth, a swaging tool capable of engaging beneath the teeth, means for rotating the tool, means for moving the head along the guides out of the operative position, a spring adapted to return the head to the operative position, a vise carried by the head, means for causing the vise to clamp the saw to the head during the swaging of a tooth and means for side dressing the teeth after they have been sWage-d.

12. In a machine for forming the teeth of saws, the combination of means for feed ing a saw through the machine, a swaging tool capable of taking up the correct position beneath each tooth, means for causing the tool to svvage the teeth and means for side dressing the teeth capable of taking up the correct position for side dressing each particular tooth.

13. In a machine for forming the teeth of saws, the combination of a swaging head,

an anvil carried thereby and adapted to rest upon the tops of the teeth, a svvaging tool which is capable of engaging beneath the teeth, means for imparting to the head a reciprocating movement, means for rotating the tool, a pair of pivoted bars, a sidedressing tool carried by each bar, means for turning the bars together and means for causing them to converge upon the teeth.

14. In a machine for forming the teeth of saws, the combination of a swaging head, an anvil carried thereby and adapted to rest upon the tops of the teeth, a swaging tool which is capable of engaging beneath the teeth, means for imparting to the head a reciprocating movement, means for rotating the tool, means for feeding the saw through the machine, a pair of pivoted bars, a sidedressing tool carried by each bar, means for turning the bars together and means for causing them to converge upon the teeth.

In testimony that I claim the foregoing as my invention I have signed my name this 30th day of October, 1918.

FELIX ARTHUR LAMBLEY. 

